From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH] for-each-ref: `:short` format for `refname`
Date: Mon, 01 Sep 2008 14:28:17 -0700
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Cc: "Shawn O. Pearce" <spearce@spearce.org>,
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To: "Bert Wesarg" <bert.wesarg@googlemail.com>
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 (Bert Wesarg's message of "Mon, 1 Sep 2008 23:10:38 +0200")
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"Bert Wesarg" <bert.wesarg@googlemail.com> writes:

> On Mon, Sep 1, 2008 at 21:10, Shawn O. Pearce <spearce@spearce.org> wrote:
> ...
>> You can still get ambiguous names.  Avoiding them requires going
>> through all refs and building their short forms, then using the
>> full ref name for any ref which had more than one name shorten to
>> the same string.  Ugly, but implementable, and probably something
>> that should be considered.
>
> What about: try the list backwards until the first match, than try the
> matched part (this what %.*s matched) with the forward list, if both
> give the same pattern, its not disambiguous. If not try the next
> pattern backwards.

How does it catch the case where you have both 'xyzzy' branch and 'xyzzy'
tag, which is the point of disambiguation issue Shawn raised?